Ungraded vs Grade 8.0 Detective Comics #290 (1961): price difference
Detective Comics #290 (1961) value — Ungraded $39 vs Grade 8.0 $228. Grade 8.0 sells for 5.85× Ungraded (+485%). Prices updated September 2026.
Medians of real sold listings per grade, updated September 2026 — how we compute values.
Grade 8.0 sells for 5.85× (+485%) the Ungraded price — a $189 difference per comic.
Grade 8.0 sells for 2.68× (+168%) the Grade 6.0 price — a $143 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Detective Comics #290 (1961), the jump from Ungraded to Grade 8.0 is worth $189 (5.85×) — if your copy grades at the top, that premium can cover the fee. A grade below the top one changes the math, so run your exact numbers first.
Run the grading break-even math →Values are estimates from real sales data — not appraisals or offers. Some links earn JunkPal a commission at no cost to you (disclosure).